Incandescent electric lamp.



V. MARTINEZ.

INCANDESCENT ELECTRIC LAMP. APPLICATION FILED JUNE 4. i917.

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Patent-ed Nov. 5, 1918.

V. MARTINEZ.

INCANDESCENT ELECTRIC LAMP.

APPLICATION FILED IIINELI. I9I7.

Patent-ed Nov. 5, 1918.

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Speeication of Letters Patent.

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application ined .rune e, i917. serial no. i7a,77e.

To all whom t may concern:

`lBe it known that 1,'Vro'ronINo MARTINEZ, a citizen of the Republic ofCuba, and a resident of Habana, Cuba, have invented certain new anduseful improvements in incandescent Electric Lamps, of which thefollowing is a specification.

This invention relates to incandescent electric lamps, particularly tothose electric lamps used in connection 'with non-metallic sockets,`such as the socket described and illustrated in the s ecication anddrawings of an invention o? the applicant which is entitledllmprovements in electric lamp holders, an application for which wasiled April 15th, raie, 1U. s. serial No. 91469, and is now Fat. No.1,226,558. llts object is to provide a new lamp not provided with themetallic casket that the lamps heretofore used have, but the onlymetallic part which it has is that of the two contacts' required for thepassage of the electric current to the filament, this new lamp beingadvantageous for the reason that its cost of manufacture is cheaper thanthat of the lamps at present in use.

'l`he invention is described with reference to the figures ofthe'annexed drawing, of which:

Figure 1 is an outer elevation of'a lamp provided with the improvementswhich are the object of this invention.

Fig. 2 is an upper plan view thereof.

Fig. 3 is a vdiametral vertical section of same. And Fig. 4c is an outerelevation of said. lamp in connection with a proper socket, this onebeing shown in section.

The lampl' which is the object of this invention is without a metalliccasket and its glass collar 2' is provided with a screw thread 3 for itssecuring to the socket or lamp holder, and its upper portion, that isthe part on which the glass is bent inwardly and downwardly for securingor holding the metallic conductors 4 and 5 constituting the electrodes,forms on'its inner face an annular settin Y ceive a metalllc ring 7which is preferably provided with' projecting inner points 8 in numberof four or more equidistant between one another and which constitute theexterior contact of the lamp or bulb 1. rllhe glass collar 2 forms anupright annular Harige 2 projecting suiciently above. rin 7, for thepurpose that will be describe 6 which is designed to re-` later. Within`the metallic ring 7 ts a block of electricity insulating paste 9 whichproJects upwardly and presents in` the center of its upper part a recess10 in which 1s lodged a small metallic plug 11 forming the interiorcontact of the lamp or bulb 1 and said block 9 has at its lower portiona button-shaped projection 12 whose head grips with a mass of insulatingpaste 13 which in fluid condition is poured in the small glass funnel 14through the interior of which pass the electrodes 4 and 5 and whichconstitutes a support for the glass stud 15 which holds the variousportions of filament 16., Said insulating paste 13 lills the upperportion of the small funnel 1-1 which presents in its inner surface aplurality of projecting glass points 17 distributed along the circleofthe small funnel and whichserve to grasp with the mass of insulatingpaste 13when same is poured in, the lower partof the small funnel beingfilled with cotton 18. As illustrated in the drawings, the electrode 4:passes through the cotton 18 and mass of insulating paste 13 and isattached to the outer contact 7 and the .electrode 5 passes through thecotton 18 and mass of insulating paste 13 and insulating block 9 and isattached to the inner contact 11.

'llhe described construction clearly shows that the contacts 7 and 11 ofthe electric llamp or bulb are perfectly secured to the glass materialforming the lamp.

'llhis new construction lamp is designed for being used with anon-1netallic or electricity nonconducting material socket, such as thesocket 19 illustrated in Fig. 4 of the drawing, which has a screwthread20 at the inner surface of its mouth for threading therein theglass collar 2 of the lamp 1, until the contacts 7 and 11 of lamp 1respectively engage the contacts 21 and 22 of the contact bearing body23 which forms a part and occupies the interior of socket 19. 0f saidtwo contacts 21 and 22, the' outer one 21 is helically shaped so as tobear against the metallic ring 7 of the lamp and the inner one 22 is a`button that bears on the central contact 11 of the lamp. The contactbearing body 23 can be of any appropriate. construction, it beingillustrated as being proby a fusible wire 25 to the other small plate 26to which is attached one of the conducting wires 27, the otherconducting wire 28 being atJ ached to a metallic central pin 29 endingin the contact 22 and which occupies a recess or central cavity in thebody 23. Since outer contact 21 of the contact carrying body 23 engagesthe outer contact 7 of the lamp at a good distance underneath the edgeof flange 2 of collar 2 of the lamp, there is no danger that a sparkbetween both contacts may burn the wood of the socketf19 since thissocket is entirely protected by the glass of collar 2 of the lamp.

Since the lamp is not provided with the common metallic casket and thesocket is made out of wood, the construction of both results'verycheap.v

What I claim is:

In electric incandescent lamps having non-metallic sockets, thecombination of a glass collar provided with a screw thread adapted to bescrewed into a lamp holder, an annular setting on said collar, ametallic ring on said setting, a block of insulating paste within saidring, projections on the ring embedded in said paste and constitutingone of the contacts of the lamp, an upright annular flange on saidcollar projecting above said ring, said block being prf/- vided with arecess 1n the center of its upper part,a small metallic plug in saidrecess constituting a second contact, a button shaped projection on thelower part of said block, a glass funnel, insulating paste in the upperpart, and a cotton wad in the lower part of said funnel, an electrodepassing through said cotton wad and said insulating paste, secured tothe ring projections constituting a contact, a second electrode alsopassing through said cotton wad and insulating paste, secured to saidmetallic plug, a glass stud secured to said funnel and filamentssupported by said stud and connected to said electrodes.

In testimony whereof I aix my signature in presence of two witnesses.

VICTORINO MARTINEZ.

Witnesses CARLOS NOGUERAL, C. CHARTRAND.

